Use stack frame marker constants to mark arguments adaptor frame.

src/x64/frames-x64.h

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 74 matching lines @@
   static const int kMarkerOffset      = -2 * kPointerSize;
   static const int kContextOffset     = -1 * kPointerSize;
   static const int kCallerFPOffset    =  0 * kPointerSize;
   static const int kCallerPCOffset    = +1 * kPointerSize;
   static const int kCallerSPOffset    = +2 * kPointerSize;
 };
 
 
 class JavaScriptFrameConstants : public AllStatic {
  public:
+  // FP-relative.
   static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset;
   static const int kSavedRegistersOffset = +2 * kPointerSize;
   static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset;
 
+  // Caller SP-relative.
   static const int kParam0Offset   = -2 * kPointerSize;
   static const int kReceiverOffset = -1 * kPointerSize;
 };
 
 
 class ArgumentsAdaptorFrameConstants : public AllStatic {
  public:
   static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset;
 };
 
 
 class InternalFrameConstants : public AllStatic {
  public:
   static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset;
 };
 
 
 inline Object* JavaScriptFrame::function_slot_object() const {
   const int offset = JavaScriptFrameConstants::kFunctionOffset;
   return Memory::Object_at(fp() + offset);
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_FRAMES_X64_H_